Means for producing oscillating currents of high frequency.



A. H. COHEN. MEANS FOR PRODUCING OSGILLATING GURRENTS OF HIGH FREQUENCY.

APPLIGATION FILED FEB. a, 1913.

1,1 wg ifia Patented Sept. 8, 1914.

' WII'INESS ES: INVEUTOR ATX'ORNEY .view of the carbon electrode.

NITE sirres PATENT oFFIc-E.

ALFRED n. connnyorsnurnANcIsco, CALIFORNIA.

MEANS FOR PRODUCING oscILmATING ounnnms OF HIGH FREQUENCY.

To a '11-]: mn it may concern:

Be it known that 1, ALFRED H. Comm, acilizcn of the United States, residing at San Francisco.- in the county of San Fran cisco and State of California, have invented new and useful Improvements in Means for Producing Oscillating Currents of High Frequency, of which the folowing is a specilication.

This invention relates to an apparatus for the production of oscillatory currents of high frequency.

The object of the invention is to produce asimple and practical apparatus for the production of oscillatory currents of high frequency, persistency, force and effect, by means of which wireless telephony and telegraph may be carriedout, and by which wireless power may be transmitted.

Another object of the invention is to so construct the apparatus that an inclosure of any kind may be entirely elimingted, thereby producing a structure that is open to constant operation and inspection, and which may be easily adjusted and regulated to produce thebest results and highest etheiency.

Further objects will appear hereinafter.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figure 1 is a side elevation of the invention partlyin section. Fig. 2 is a bottom Fig. 3 is a plan view of the metal electrode.

Referring to the drawings the invention consists of an oscillatory spark-gap apparatus having inter-spaced terminal'electrodcs, which may be constructed of metal and carbon, or either, the faces of which are opposed to each other and parallel.

Referring to Fig. 1 of the drawings, I have shown the apparatus as being provided with a hollow stationary metal electrode 2, and a vertically adjustable-carbon electrode 3. The carbon electrode is here shown as carried by a hollow head member at, formed on the end of a vertically positioned and adjustable shaft 5. The carbon electrode may be secured in the hollow head 4 in any suitable manner, and is also shown as provided with a plurality of verticallypositioned passages 6 extending through the length of the carbon, which are provided for the purpose Specification of Letters Patent.

Patented Sept. 8, 1914.

Application filed February 3. 1913. Serial No. 745,832.

upper edge with a series of angularly positioned discharge openings 10. This is provided for the purpose of discharging the in'iperfectly conducting liquid against the lower face of the carbon electrode. The imperfectly conducting liquid is stored in a tank or similar receptacle indicated at C, to which it is returned from a receiving receptacle 1) by a power pump, or any other suitable means, indicated at 11, after having passed through the various passages in the electrodes.

The tank is shown as provided with a manifold discharge 12, one end of which is connected by a flexible tube, or similar means 13, with the hollow head supporting the carbon electrode, while the opposite end of the manifold is connected by a pipe 14 with the annular hollow ring 9 surrounding the metal electrode; suitable valves, as 15 and 16 being interposed in the opposite branches to control the flow of liquid through the op posite electrodes.

The imperfectly conducting liquid supplied from the tank or receptacle C flows through the pipe 13, head 4-, and discharges through the vertical passagef G formed in the passages (3 in the carbon electrode, thus insures a perfect unbroken film and an intense circulation between the faces of the electrodes.

The effect produced by the imperfectly iii) conducting liquid, before described, is that it allows the are or spark to discharge at numerous points on the electrodes by reason of the fact that the spark will always seek the coolest place thereof when discharging from one face to the other; this being caused by the peculiar quality of the liquid which increases in resistance as it becomes heated, thus the discharge of the spark at one position will cause a sullicient change in temperature at that point to force the spark to discharge in another point; thus the spark, as the liquid is heated, will constantly seek new points where the liquid is cooler and discharge there.

The result of the constant change of the spark gap is that the carbon electrode is burned equally all around; there being no pits or holes formed therein, as is the case. where no liquid is used. The liquid overcoming the objeelioinible efi'ects just described, will. thus keep the electrodes in a condition where a constant, regular, uniform, and persistent discharge can take place, and will thus produce oscillations of high frequency, force, and eli'ect. or any imperfectly conducting liquid may be used to produce this result.

An apparatus constructed as here shown permits the operation of a so-called open arc, the operation of which may be constantly observed and inspected, and which may be easily adjusted and regulated to produce the highest efliciency and best results.

Having thus described my invention, what I claim and-desire to secure by Letters Patent, is

1. In a spark gap apparatus of the character described, opposed electrodes having parallel surfaces between which electrical discharges are caused to pass, one of said electrodes having parallel passages made through it, and the other having an annular chamber with openings converging toward the first-named electrode, a container for an imperfectly conducting liquid, pipes connecting the container with each of the passages and openings, and cocks by which the proportionate discharge of the liquid may be regulated.

2. In a spark gap apparatus of the character described, opposed electrodes having parallel surfaces between which electrical discharges are caused to pass, one of said electrodes having parallel passages made through it, and the other having an annular Alcohol,

chamber with openings converging toward the first-named electrode, a container for an imperfectly conducting liquid, pipes connecting the container with each of the passages and openings, cocks by which the proportionate discharge of the liquid may be regulated, a secondary cont-inner mounted below the electrodes adapted to catch the liquid which escapes from the space -formed between the electrodes, and means for returning the liquid from the secondary ontainer to the supply container.

3. In a spark gap apparatus of the character described, a carbon electrode, a metal electrode having a face parallel with that of the carbon electrode, means for separating the electrodes, ahollow ring surrounding the metal electrode, and secured to the same, a, plurality of upwardly and inwardly inclined discharge passages formed in said ring, a container for an in'iperfectly conducting liquid, a pipe connecting the container with the hollow ring, and a valve on said pipe to control the flow of liquid.

4. A spark gap apparatus of the character described, a carbon electrode, a metal electrode having a face parallel wit-h that of the carbon electrode, means for separating the electrodes, a hollow ring surrounding the metal electrode, and secured to the same, a plurality of upwardly and inwardly inclined discharge passages formed in said ring, a cylinder in which the carbon electrode is mounted, a space formed in the cylinder above said electrode, a plurality of passages formed in said electrode communicating with the cylinder space and the lower face of the electrode, a container for an imperfectly conducting liquid, pipes connecting the container with the cylinder space and hollow ring, cocks by which the proportionate discharge of liquid may be "egulated, a secondary container mounted below the electrodes adapted to catch the liquid which escapes from the space formed between the electrodes, and means for retaining the liquid from the secondary container t0 the supply container.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ALFRED H. COHEN.

Witnesses:

J OH H. HERRING,

W. W. HEALEY. 

